U2C_RESULT U2C_GetSerialNum( HANDLE hDevice, long* pSerialNum );
The U2C_GetSerialNum() function retrieves the Serial Number of the current device. This is unique Serial Number. It can be used to identify device when you are using a number of U2C-12 devices simultaneously.
Serial Number was successfully obtained.
U2C-12 device referenced by hDevice handle was not found.